After traveling to Tang China to study, Kukai was the founder of the Shingon school of Buddhism. See how his return to a politically fraught Japan created the opportunity to spread his teachings.
To learn Buddhism's secrets, you have 
to start with learning Sanskrit.
Para develar los secretos del budismo,
el sánscrito es el primer paso.
Para aprender os segredos do budismo, você
precisa começar aprendendo o sânscrito.